Absolute Age Dating

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there 12.5% parent isotope left?

• 50 years

• 100 years

• 200 years

• 300 years

Tags

NGSS.HS-PS1-8

If you had 1000 atoms of parent isotope, then how many parent atoms would you have after 3 half-lives?

• 75 atoms

• 250 atoms

• 500 atoms

• 125 atoms

Tags

NGSS.HS-PS1-8

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there 25% parent isotope left?

• 50 years

• 100 years

• 200 years

• 300 years

Tags

NGSS.HS-PS1-8

How does absolute age differ from relative age?

• Only absolute dating indicates which rock is older than another

• Only absolute dating finds the age in years

• Only relative dating finds the age in years

_______________is the method of determining the absolute ages of rocks.

• radiometric dating

• relative dating

The amount of time it takes for a parent isotope to decay by half

• daughter-half

• half-life

• life-element

• quarter-life

Tags

NGSS.HS-PS1-8

How many half-lives have passed if there 12.5% parent isotope left?

• 1 half-life

• 2 half-lives

• 3 half-lives

• 4 half-lives

Tags

NGSS.HS-PS1-8

The original element that undergoes radioactive decay is known as the...

• daughter element

• half-life

• parent element

• radioactive decay

Tags

NGSS.HS-PS1-8

What is the primary method used in absolute age dating to determine the age of rocks?

• Radiometric dating

• Relative dating

• Stratigraphy

• Fossil correlation

If a rock contains 25% of its original radioactive parent isotope, how many half-lives have passed?

• 1 half-life

• 2 half-lives

• 3 half-lives

• 4 half-lives

Tags

NGSS.HS-PS1-8